ATmega64A Atmel Corporation, ATmega64A Datasheet - Page 297

• Manufacturer Part Number: ATmega64A
• Manufacturer: Atmel Corporation

Specifications of ATmega64A

• Flash (kbytes): 64 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 53
• Ext Interrupts: 8
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Uart: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 4
• Eeprom (bytes): 2048
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 4
• Output Compare Channels: 8
• Input Capture Channels: 2
• Pwm Channels: 7
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

27.2.1
8160C–AVR–07/09
Latching of Fuses
Table 27-4.
Note:
Table 27-5.
Note:
The status of the Fuse bits is not affected by Chip Erase. Note that the Fuse bits are locked if
Lock bit1 (LB1) is programmed. Program the Fuse bits before programming the Lock bits.
The fuse values are latched when the device enters Programming mode and changes of the
fuse values will have no effect until the part leaves Programming mode. This does not apply to
OCDEN
JTAGEN
SPIEN
CKOPT
EESAVE
BOOTSZ1
BOOTSZ0
BOOTRST
BODLEVEL
BODEN
SUT1
SUT0
CKSEL3
CKSEL2
CKSEL1
CKSEL0
Fuse High Byte
Fuse Low Byte
(1)
1. The SPIEN Fuse is not accessible in SPI Serial Programming mode.
2. The CKOPT Fuse functionality depends on the setting of the CKSEL bits. See
3. The default value of BOOTSZ1:0 results in maximum Boot Size. See
4. If the JTAG interface is left unconnected, the JTAGEN fuse should if possible be disabled. This
1. The default value of SUT1:0 results in maximum start-up time. See
2. The default setting of CKSEL3:0 results in internal RC Oscillator @ 1 MHz. See
(2)
(4)
Sources” on page 38
to avoid static current at the TDO pin in the JTAG interface
details.
page 38
Fuse High Byte
Fuse Low Byte
for details.
Bit no
Bit no
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
Description
Brown out detector trigger level
Brown out detector enable
Select start-up time
Select start-up time
Select Clock source
Select Clock source
Select Clock source
Select Clock source
Description
Enable OCD
Enable JTAG
Enable SPI Serial Program and Data
Downloading
Oscillator options
EEPROM memory is preserved
through the Chip Erase
Select Boot Size (see
details)
Select Boot Size (see
details)
Select Reset Vector
for details.
Table 26-6
Table 26-6
for
for
Default Value
1 (unprogrammed)
1 (unprogrammed, BOD disabled)
1 (unprogrammed)
0 (programmed)
0 (programmed)
0 (programmed)
0 (programmed)
1 (unprogrammed)
Default Value
1 (unprogrammed, OCD
disabled)
0 (programmed, JTAG
enabled)
0 (programmed, SPI prog.
enabled)
1 (unprogrammed)
1 (unprogrammed, EEPROM
not preserved)
0 (programmed)
0 (programmed)
1 (unprogrammed)
Table 8-8 on page 42
ATmega64A
Table 26-6 on page 292
(1)
(2)
(2)
(2)
(1)
(2)
(3)
(3)
“Clock
Table 8-1 on
for
297